CN214182339U

CN214182339U - Concentrated high-efficient desulfurization degree of depth dust collector of waste water

Info

Publication number: CN214182339U
Application number: CN202022682300.6U
Authority: CN
Inventors: 王萍萍; 陈新虎; 孙振山; 陈淼
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-19
Filing date: 2020-11-19
Publication date: 2021-09-14
Anticipated expiration: 2030-11-19

Abstract

The utility model relates to a high-efficiency desulfurization deep dust removal device for wastewater concentration, which comprises an absorption tower, wherein the top of the absorption tower is provided with a chimney communicated with the inside of the tower, the absorption tower is internally divided into a concentration bin, a spraying bin and a slurry bin from top to bottom by an upper baffle and a lower baffle, a demisting chamber for mounting a demister is also arranged in the absorption tower, the upper end of the demisting chamber is communicated with the chimney, and the lower end of the demisting chamber sequentially penetrates through the upper baffle and the lower baffle and is communicated with the slurry bin; the smoke inlet is formed in one side of the concentration bin, the concentrated solution spraying layer is installed above the upper partition plate in the concentration bin, the lower smoke inlet which communicates the concentration bin with the spraying bin is formed in the upper partition plate, the slurry spraying layer is installed above the lower partition plate in the spraying bin, and the scattering pipe which communicates the spraying bin with the slurry bin is installed on the lower partition plate. The utility model discloses mainly solved the waste heat utilization of flue gas, the concentrated decrement of desulfurization waste water has reduced the desulfurization energy consumption, has reduced desulfurization technology water consumption, has reached the index of ultralow desulfurization, has realized the degree of depth and has removed dust to by a wide margin reduction secondary pollution.

Description

Concentrated high-efficient desulfurization degree of depth dust collector of waste water

Technical Field

The utility model relates to a desulfurization waste water treatment and flue gas desulfurization dust removal technical field, concretely relates to concentrated high-efficient desulfurization degree of depth dust collector of waste water.

Background

The current flue gas desulfurization technology mainly takes wet desulfurization as main technology. The existing wet desulphurization systems mainly used for removing SO comprise multilayer spraying, spraying and tray adding technologies and the like₂Mainly, the design neglects the heat energy utilization of the absorption tower, the cooperative dust removal of the absorption tower and the energy saving of the absorption tower after reaching the desulfurization index. In addition, the spraying of the desulfurization flue gas and the slurry are also reverse spraying, a large amount of ultrafine particles and droplets of ultrafine oil-containing dissolved salt can be formed, and because the demister cannot be removed, the ultrafine particles and the droplets of the ultrafine oil-containing dissolved salt enter the atmosphere to cause secondary pollution.

SUMMERY OF THE UTILITY MODEL

For solving prior art's problem, the utility model provides a flue gas desulfurization degree of depth dust collector has realized the waste heat utilization of flue gas, and the concentrated decrement of desulfurization waste water reduces desulfurization technology water consumption, and degree of depth desulfurization removes dust, reduces the desulfurization energy consumption, gets rid of multiple pollutant and reduces secondary pollution in coordination.

The utility model discloses a realize through following technical scheme:

the deep dust removal device for flue gas desulfurization comprises an absorption tower, wherein a chimney communicated with the inside of the absorption tower is arranged at the top of the absorption tower, an inner cavity of the absorption tower is divided into a concentration bin, a spraying bin and a slurry bin from top to bottom by an upper partition plate and a lower partition plate, a demisting chamber provided with a demister is also arranged in the absorption tower, the upper end of the demisting chamber is communicated with the chimney, and the lower end of the demisting chamber sequentially penetrates through the upper partition plate and the lower partition plate and is communicated with the slurry bin; the smoke inlet is formed in one side of the concentration bin, the concentrated solution spraying layer is installed above the upper partition plate in the concentration bin, the lower smoke inlet communicated with the concentration bin and the spraying bin is formed in the upper partition plate, a baffle preventing the concentrated solution from flowing into the lower smoke inlet is installed at the lower smoke inlet, the slurry spraying layer is installed above the lower partition plate in the spraying bin, and the scattering pipe communicated with the slurry bin is installed on the lower partition plate.

Furthermore, the concentrated solution spraying layer is connected with one end of the concentrated solution pipe, the other end of the concentrated solution pipe is communicated with the concentrated solution tank outside the absorption tower through a concentrated circulating pump, and the upper clapboard is provided with a reflux port and is connected with the concentrated solution tank through a reflux pipe.

The concentrated solution spraying layer is used for providing concentrated solution to spray flue gas in a concentrated bin by matching a concentrated solution box with a concentrated circulating pump, the flue gas is cooled, the temperature of the flue gas can be generally reduced to 70-90 ℃, meanwhile, the humidity of the flue gas is increased, so that the desulfurization wastewater is evaporated and concentrated, 40-60% of smoke dust can be removed, and favorable conditions are provided for next desulfurization.

Furthermore, the concentrated solution spraying layer is annularly arranged by taking the spraying chamber as a center, the concentrated solution spraying layer is uniformly provided with concentrated nozzles, and the concentrated nozzles are not arranged at the positions opposite to the lower smoke outlet.

The concentrated layer that sprays is arranged into the ring-type along concentrated storehouse top, does not set up concentrated nozzle down the mouth top, and the concentrate that sprays can carry out the intensive mixing heat transfer with the flue gas, realizes humidifying the cooling to the flue gas fast to can realize the function of dust removal in advance.

Furthermore, the slurry spraying layer is connected with one end of the slurry circulating pipe, and the other end of the slurry circulating pipe is communicated with the slurry cabin through the slurry circulating pump.

The slurry spraying layer sprays the flue gas, the flue gas desulfurization efficiency is generally controlled to be 30-80%, the liquid-gas ratio is controlled to be 1-8, and high-concentration SO is fully utilized₂The removal rate is high.

Furthermore, the slurry spraying layer is annularly arranged by taking the spraying chamber as a center, and slurry nozzles are uniformly arranged on the slurry spraying layer.

The slurry spraying layer is annularly arranged along the top of the spraying layer, the spraying area of the slurry can be increased, the spraying efficiency is improved, the mixing efficiency of the slurry and the flue gas is improved, and efficient desulfurization is realized.

Preferably, the lower end of the diffuser pipe is inserted below the liquid level of the slurry tank and the end is provided with the diffuser.

The scatterer can change the dispersion degree of the flue gas entering the slurry bin, increase the contact area of the flue gas and the slurry in the slurry bin, and avoid the continuous contact of the flue gas and a certain local slurry to cause SO₂Incomplete cleaning occurs.

Furthermore, a plurality of first scattering slits are formed in the bottom surface of the diffuser, and a plurality of second scattering slits are formed in the side wall of the diffuser in the height direction.

The first scattering seam and the second scattering seam are arranged on the scatterer, so that the smoke can be discharged into the slurry bin through the scattering seams to be mixed with the slurry, and the scattering seams with different shapes can change the flowing angle of the smoke, so that the smoke can be conveniently diffused into the slurry at different angles and can be uniformly mixed with the slurry.

Further, the first scattering seam is one or a combination of a circular seam and an inclined seam.

Further, the second scattering slit is a straight slit.

When the flue gas emerges from the inclined seam and the circular seam of the scatterer, the slurry in the slurry bin can be disturbed, a thick bubble layer is formed on the surface of the slurry area, and the bubbles are continuously broken and updated. SO in flue gas₂The fly ash in the flue gas can be removed after contacting the liquid film. After bubbling through a diffuser, the pollutant SO in the flue gas₂≤35mg/m³Dust less than or equal to 5mg/m³。

The utility model has the advantages that:

firstly, the concentration and decrement of the desulfurization wastewater can be realized by fully utilizing the heat energy of the flue gas; the flue gas can be pre-humidified by utilizing the desulfurization wastewater, so that the process water consumption is saved; the concentrated waste water is fully utilized for concentration and pre-dedusting the original flue gas.

The novel bubbling scattering tube and the diffuser can realize the high-efficiency deep desulfurization dust removal effect, reduce the generation of fine liquid and aerosol, and greatly reduce the problem of secondary pollution.

Thirdly, the insertion depth of the scattering pipe can be changed by adjusting the liquid level of the slurry bin, and the SO outlet is adjusted₂The concentration and the adjustment are flexible.

Fourthly, the optimized tower body structure is adopted, the demisting chamber is arranged in the middle, and a special smoke ascending pipe is not needed, so that the height of the desulfurizing tower is effectively reduced, and the construction cost is saved; the device has simple structure, reliable operation and convenient maintenance.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;

FIG. 4 is a cross-sectional view taken along line C-C of FIG. 1;

fig. 5 is a schematic view of a diffuser-1;

fig. 6 is a schematic view of a diffuser-2.

Shown in the figure:

the device comprises a smoke inlet 1, a concentration bin 2, a spraying bin 3, a slurry bin 4, a demisting chamber 5, a chimney 6, a concentrated solution spraying layer 7, an upper partition plate 8, a lower smoke outlet 9, a slurry spraying layer 10, a lower partition plate 11, a scattering pipe 12, a scattering device 13, a concentrated solution tank 14, a concentration circulating pump 15, a concentrated solution pipe 16, a return pipe 17, a spraying circulating pump 18, a slurry circulating pipe 19, a demister 20, a baffle plate 21, a circular seam 22, an oblique seam 23 and a straight seam 24.

Detailed Description

In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.

A high-efficiency desulfurization deep dust removal device for wastewater concentration comprises an absorption tower, wherein a chimney 6 communicated with the inside of the absorption tower is arranged at the top of the absorption tower, an inner cavity of the absorption tower is divided into a concentration bin 2, a spraying bin 3 and a slurry bin 4 from top to bottom by an upper partition plate 8 and a lower partition plate 11, a demisting chamber 5 provided with a demister 20 is also arranged in the absorption tower, the upper end of the demisting chamber 5 is communicated with the chimney 6, and the lower end of the demisting chamber 5 sequentially penetrates through the upper partition plate 8 and the lower partition plate 11 and is communicated with the slurry bin 4; the smoke inlet 1 is opened to one side of concentrated storehouse 2, and concentrated solution sprays layer 7 is installed to 8 tops of last baffle in concentrated storehouse 2, has seted up on the last baffle 8 with concentrated storehouse 2 with spray the lower mouth of a cigarette 9 of storehouse 3 intercommunication to install the baffle 21 that prevents the concentrated solution to flow into lower mouth of a cigarette 9 in mouth of a cigarette 9 department down, spray the storehouse 3 in 11 tops of baffle down and install the thick liquid and spray layer 10, install on the baffle 11 down and will spray the diffuser 12 of storehouse 3 and thick liquid storehouse 4 intercommunication.

The concentrated solution spraying layer 7 is connected with one end of a concentrated solution pipe 16, the other end of the concentrated solution pipe 16 is communicated with a concentrated solution box 14 outside the absorption tower through a concentrated circulating pump 15, and the upper clapboard 8 is provided with a return port and is connected with the concentrated solution box 14 through a return pipe 17. The concentrated solution spraying layer 7 is annularly arranged by taking the spraying chamber 5 as a center, and concentrated nozzles are uniformly arranged on the concentrated solution spraying layer 7 and are not arranged at the position right opposite to the lower smoke hole 9.

The slurry spraying layer 10 is connected with one end of a slurry circulating pipe 19, and the other end of the slurry circulating pipe 19 is communicated with the slurry cabin 4 through a slurry circulating pump 15. The slurry spraying layer 10 is annularly arranged by taking the spraying chamber 5 as a center, and slurry nozzles are uniformly arranged on the slurry spraying layer 10.

The lower end of the diffuser tube 12 is inserted below the liquid level of the slurry tank 4 and the end is fitted with a diffuser 13. The bottom surface of the diffuser 13 is provided with a plurality of first diffusion slits, which are a combination of circular slits 22 and oblique slits 23. The side wall of the diffuser 13 in the height direction is provided with a plurality of second diffusion slits, and in the present invention, the second diffusion slits are straight slits 24.

As shown in figure 1, the utility model discloses a concentrated high-efficient desulfurization degree of depth dust collector of waste water mainly comprises concentrated storehouse 2, spray storehouse 3, thick liquid storehouse 4, four storehouses of defogging room 5.

The working principle is as follows: the flue gas gets into concentrated storehouse 2 through advancing cigarette mouth 1, sprays the lower cigarette mouth 9 on the back through the last baffle again and enters into and sprays storehouse 3 at concentrated storehouse 2 after concentrated solution sprays layer 7, sprays in storehouse 3 through thick liquid and sprays layer 10 and then get into in the diffuser 12 on the baffle down, spout again by installing in diffuser 13 at diffuser 12 bottom, through thick liquid washing in thick liquid storehouse 4 after, enter into defogging chamber 5 in, discharge into the atmosphere by chimney 6 after the defogging of defogger 20 in defogging chamber 5.

The concentration bin 2 has the main functions of spraying the desulfurization wastewater to the flue gas and cooling the flue gas; increasing the moisture content of the flue gas, so that the desulfurization wastewater is evaporated and concentrated; 40-60% of smoke dust can be removed; provides favorable conditions for the next desulfurization and dust removal. After the smoke of the concentration bin 2 enters through the smoke inlet 1, the smoke is divided on two sides and simultaneously reaches the lower smoke outlet 9 on the upper partition plate 8. The flow rate of the flue gas is generally controlled to be 3-6m/s, the annular width of the concentration bin 2 is consistent with that of the spray bin 3, and the height can be comprehensively determined according to the flow rate of the flue gas and the height of the concentrated solution spray layer 7. The temperature of the general flue gas is reduced to 70-90 ℃ after being sprayed by the concentrated solution spraying layer 7, the spraying amount of the desulfurization waste water can be determined according to the temperature of the inlet flue gas and the temperature of the flue gas required to be reduced, and then the flow of the concentration circulating pump 15 is determined.

The spraying bin 3 is mainly used for spraying and desulfurizing the flue gas, the desulfurization efficiency is determined according to the sulfur content of the inlet flue gas and is generally controlled to be 30-80%, and the residual sulfur content in the flue gas is controlled to be 1000 mg/m-600 plus material after the flue gas is sprayed by the slurry spraying layer 10³. The designed flow rate of the flue gas is 2-5m/s, the annular width of the spraying bin 3 is determined according to the arrangement of the scatterer, and the height is determined according to the flow rate of the flue gas.

The main function of the slurry bin 4 is to uniformly scatter the flue gas into the slurry through the scattering pipe 12 and the scattering device 13 to complete SO₂Absorption, neutralization, oxidation, stirring and further deep dust removal. The diameter of the scattering tube 12 is generally 150-500mm, and the length thereof is generally 2-3.5 m. The material can be plastic tube, glass fiber reinforced plastic tube or nylon tube. The diameter of the diffuser is generally 300-1000mm, the height is 80-150mm, the circular holes 22, the oblique slits 23 and the like are formed on the plane, the aperture is 6-20mm, the straight slits 24 are formed on the height around the diffuser, the width of the straight slits is 6-20mm, and the height is 10-50 mm. The flow rate of flue gas in the slurry tank 4 is controlled to be 1-2 m/s. When the flue gas enters the diffuser 13 from the diffuser pipe 12, the flue gas is ejected from the circular slits 22, the inclined slits 23 and the surrounding straight slits 24 on the surface of the diffuser 13 under the action of pressure, the slurry is disturbed to form a thick layer of bubbles, and SO in the flue gas is₂The dust in the smoke is captured by the liquid film on the surface of the bubble, and the bubble layerContinuously breaks and continuously forms to form a continuous bubble layer.

The demisting chamber 5 has the main function of installing a demister 20 for removing fog drops in the flue gas, so that the content of the fog drops in the flue gas at the outlet is less than 75-20mg/m³. The flow velocity of the flue gas in the demisting chamber 5 is generally controlled to be 3.5-5.5m/s, the corresponding flow velocity of the flue gas is determined according to the specific form of the installed demister 20, and the diameter of the demisting chamber 5 is further determined according to the flow velocity of the flue gas. The demisting chamber 5 is arranged in the middle of the tower body, a special flue gas ascending pipe does not need to be arranged, the height space of the desulfurizing tower is fully utilized, the height of the desulfurizing tower is effectively reduced, and the construction cost is saved.

The circulating spray pump 18 continuously extracts the slurry from the lower part of the slurry bin 4 and sprays the slurry through the spray bin spray layer 10, the sprayed slurry flows back into the slurry bin 4 through the scattering pipe 12 and then is continuously conveyed to the spray bin spray layer 10 by the circulating spray pump 18 to be continuously sprayed and desulfurized, and a large flowing circulation is formed. The slurry in the slurry cabin 4 is stirred and oxidized by the oxidation fan and the pulse pump which are arranged in the circulating process, so that the full mixing is obtained, and the stability of the desulfurization and dust removal efficiency is ensured.

Of course, the above description is not limited to the above examples, and technical features of the present invention that are not described in the present application may be implemented by or using the prior art, and are not described herein again; the above embodiments and drawings are only used for illustrating the technical solutions of the present invention and are not intended to limit the present invention, and the present invention has been described in detail with reference to the preferred embodiments, and those skilled in the art should understand that changes, modifications, additions or substitutions made by those skilled in the art within the spirit of the present invention should also belong to the protection scope of the claims of the present invention.

Claims

1. The utility model provides a concentrated high-efficient desulfurization degree of depth dust collector of waste water which characterized in that: the absorption tower is internally provided with a demisting chamber provided with a demister, the upper end of the demisting chamber is communicated with the chimney, and the lower end of the demisting chamber sequentially penetrates through the upper partition plate and the lower partition plate and is communicated with the slurry chamber; the smoke inlet is formed in one side of the concentration bin, the concentrated solution spraying layer is installed above the upper partition plate in the concentration bin, the lower smoke inlet communicated with the concentration bin and the spraying bin is formed in the upper partition plate, a baffle preventing the concentrated solution from flowing into the lower smoke inlet is installed at the lower smoke inlet, the slurry spraying layer is installed above the lower partition plate in the spraying bin, and the scattering pipe communicated with the slurry bin is installed on the lower partition plate.

2. The wastewater concentration high-efficiency desulfurization deep dust removal device according to claim 1, characterized in that: the concentrated solution spraying layer is connected with one end of a concentrated solution pipe, the other end of the concentrated solution pipe is communicated with a concentrated solution tank outside the absorption tower through a concentrated circulating pump, and the upper clapboard is provided with a reflux port and is connected with the concentrated solution tank through a reflux pipe.

3. The wastewater concentration high-efficiency desulfurization deep dust removal device according to claim 2, characterized in that: the concentrated solution sprays the layer and uses the spray chamber to be the annular arrangement as the center, and the concentrated solution sprays the position that evenly installs concentrated nozzle on the layer and just right with lower mouth of a cigarette and does not install concentrated nozzle.

4. The wastewater concentration high-efficiency desulfurization deep dust removal device according to claim 1, characterized in that: the slurry spraying layer is connected with one end of the slurry circulating pipe, and the other end of the slurry circulating pipe is communicated with the slurry cabin through the slurry circulating pump.

5. The apparatus for concentrating, efficiently desulfurizing and deeply dedusting wastewater according to claim 4, characterized in that: the slurry spraying layer is annularly arranged by taking the spraying chamber as a center, and slurry nozzles are uniformly arranged on the slurry spraying layer.

6. The wastewater concentration high-efficiency desulfurization deep dust removal device according to claim 1, characterized in that: the lower end of the diffuser pipe is inserted below the liquid level of the slurry bin, and the end part of the diffuser pipe is provided with a diffuser.

7. The apparatus for concentrating, efficiently desulfurizing and deeply dedusting wastewater according to claim 6, characterized in that: the bottom surface of the scatterer is provided with a plurality of first scattering slits, and the side wall of the scatterer in the height direction is provided with a plurality of second scattering slits.

8. The apparatus for concentrating, efficiently desulfurizing and deeply dedusting wastewater according to claim 7, is characterized in that: the first scattering seam is one or a combination of a circular seam and an oblique seam.

9. The apparatus for concentrating, efficiently desulfurizing and deeply dedusting wastewater according to claim 7, is characterized in that: the second scattering slit is a straight slit.